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Faulty Fuse Holder causes Multiple Electrical Fault Messages

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  • #1

    Faulty Fuse Holder causes Multiple Electrical Fault Messages

    Today I went to pick up my daughter from school. I parked at the school, quickly picked her up (10 mins) and then drove away. After 2 minutes of driving the following lights have stopped working in my Tiguan:
    - front right headlight
    - front right indicator
    - rear left indicator
    - rear middle break light
    - rear left fog light

    The indicator sound was quick and the error messages appeared on my MVD one after another: "Check front right..." and so on. WTH???

    After I arrived to my destination I confirmed visually that the lights didnt work indeed. I spent there an hour and then drove away again. Guess what? Everything was working again perfectly! WTH??? In the meantime, I called VW Service and booked the car in for next week Monday.

    FYI: my car had been serviced a week ago, they replaced my original factory installed GPS and radio aerial and re-ran the antenna cable from the head unit to the antenna.

    After that I had the flat battery on the weekend (NRMA replaced it) and today this strange electrical issue. Coincidence?

    I am not a car mechanic (just an engineer), but it seems like something is loose, maybe a ground wire?
    MY18 VW Tiguan Comfortline
    Tags: None
  • #2
    Your Ebox fuse board will have melted...the fuse box next to the battery...check the 30amp fuse on the back left...pull it out..you will see it and the board melted....put a new fuse in will get them working for now but you will need a new fuse board....VDUB...
    VOLKSWAGEN TECHNICIAN - 16 YEARS OF PAIN..
    VCDS CODING- FAULT DIAGNOSIS - PRE PURCHASE INSPECTIONS- REPAIRS
    9W2 BT KITS -$300 - 9W7 BT KITS - $450 - CANBUS UPGRADE $150
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    • #3
      Originally posted by vdubmotorworx View Post
      put a new fuse in will get them working for now
      But it is working now. Cannot be the fuse loose?
      MY18 VW Tiguan Comfortline

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      • #4
        Had the same thing happen. It started with one fuse blowing which I replaced, then next time smelt something burning which was the fuse circuit board. Go see an auto electrician, cost me about $500 to fix and they checked that everything was grounded properly. just one of those

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        • #5
          Originally posted by 08elf View Post
          Had the same thing happen. It started with one fuse blowing which I replaced, then next time smelt something burning which was the fuse circuit board. Go see an auto electrician, cost me about $500 to fix and they checked that everything was grounded properly. just one of those
          But what did it cause?
          MY18 VW Tiguan Comfortline

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          • #6
            have a check of the fuse mate...you will see if thats your issue..only takes 2 mins to check ...VDUB...
            VOLKSWAGEN TECHNICIAN - 16 YEARS OF PAIN..
            VCDS CODING- FAULT DIAGNOSIS - PRE PURCHASE INSPECTIONS- REPAIRS
            9W2 BT KITS -$300 - 9W7 BT KITS - $450 - CANBUS UPGRADE $150
            BRISBANE / GOLD COAST

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            • #7
              It caused what you described, the car to reported that heaps lights had stopped working all simultaneously. It's the board. Fix that, problem solved.

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              • #8
                Originally posted by 08elf View Post
                It caused what you described, the car to reported that heaps lights had stopped working all simultaneously.
                I am sorry to be pain in the ass but that's the effect not the cause. What causes a fusebox melt?
                MY18 VW Tiguan Comfortline

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                • #9
                  Think its just a issue the board itself...as after replacing the board ive not seen one melt again so points not to being a outside issue just proberly manufacturing issue of the board that fails over time..
                  VOLKSWAGEN TECHNICIAN - 16 YEARS OF PAIN..
                  VCDS CODING- FAULT DIAGNOSIS - PRE PURCHASE INSPECTIONS- REPAIRS
                  9W2 BT KITS -$300 - 9W7 BT KITS - $450 - CANBUS UPGRADE $150
                  BRISBANE / GOLD COAST

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                  • #10
                    Originally posted by vdubmotorworx View Post
                    just proberly manufacturing issue of the board that fails over time..
                    Thanks vdub. This sounds pretty bad. I love my car, but I have never ever had any fuse problem with my 10 previous cars I drove. Especially not after 3 years and 5 months, just when the warranty expired. I would not expect something like this from VW, but again this is my first VW, before I drove Fords, Fiat, Nissans, Hondas.

                    BTW I checked the fuse box and the top left fuse (green 30) have melted just like you said.


                    Do you know what that fuse is for?
                    Last edited by PeteC; 17-08-2013, 10:27 AM.
                    MY18 VW Tiguan Comfortline

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                    • #11
                      Found it: F16 (30A) Multifunction control module 2

                      Is this the head unit?
                      MY18 VW Tiguan Comfortline

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                      • #12
                        Originally posted by PeteC View Post
                        Found it: F16 (30A) Multifunction control module 2

                        Is this the head unit?
                        sounds like the steering wheel controls if I had to guess
                        CURRENT: DBP Mk4 Golf .:R34 no. 187 (WOOKY)
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                        • #13
                          Originally posted by PeteC View Post
                          I am sorry to be pain in the ass but that's the effect not the cause. What causes a fusebox melt?
                          Had this fault too. Thought the poor Tiguan had had a stroke when everything stopped working all the way down one side
                          The cause is a high current contact that has resistance, causing heating at the interface that melts everything around it. As the contact heats and becomes burnished, the resistance increases, perpetuating the problem.
                          In this case, its likely that the spring tension of the fuse holder contact was insufficient. Manufacturing problem.
                          Merely pointed it out to the dealer, they changed the fuse box without any comment, assume it is a common fault.
                          I was speaking to a Holden product engineer, they turn off a lot of the warning feedback like this one as they see them as nuisance alarms.
                          Last edited by Sanman; 17-08-2013, 11:23 AM.
                          TDI tiguan in the drive. ParkAssist, comfort, fogs
                          Service every 15,000, new fault code every 7,500km

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                          • #14
                            Even though your car is out of warranty I would be contacting your dealer and seeing if they can replace under warranty as this sort of thing really shouldn't happen.

                            2017 Tiguan Sportline - Tigger73's 162TSI Sportline
                            2016 Scirocco R, stage 1, 205kwaw (sold) - Tigger73's Scirocco R Build
                            2013 Tiguan 155TSI, stage 1, 144kwaw (sold) - Tigger73's 155TSI Build
                            2011 Tiguan 125TSI, Stage 2+, 152kwaw (sold)                             - Tigger73's 125TSI Build

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                            • #15
                              Originally posted by Swainey32 View Post
                              sounds like the steering wheel controls if I had to guess
                              No there is another one for steering
                              MY18 VW Tiguan Comfortline

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